accounts and allocations - nersc · 2014. 2. 3. · david turner! nersc user services group!! nug...
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David Turner!NERSC User Services Group!!NUG 2014 Training for New Users!February 3, 2014
Accounts and Allocations
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Accounts vs. Allocations
There are two types of accounts at NERSC. 1. Your personal, private account
• Associated with your login or user name • Provides authen/ca/on (personal iden:ty) and authoriza/on (which
resources are accessible) • Your project’s Principal Inves:gator (PI) requests an account for you • Four primary account roles
– PI, PI Proxy, Project Manager, User 2. An alloca:on account, or repository (aka repo)
• Like a bank account you use to “pay” for computer :me and archival storage
• PIs request alloca:ons of :me and/or archival storage • All MPP users belong to at least one repo • An individual user may belong to more than one repository
– But only one default repo
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Accounts and Allocations Management
• NIM – NERSC Informa9on Management – Web-‐based tool for user and repo management
• Check daily balance, change password, change login shell, update contact informa:on, etc.
hRp://nim.nersc.gov
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Account Policies
• All users must sign Computer User Agreement h@ps://nim.nersc.gov/Computer_User_Agreement.php • Password policies – Must change password every 6 months – Do not share passwords – Do not email passwords
• Account locked aJer 5 consecu9ve login failures – Login to NIM to clear login failures – Call NERSC Account Support for more help
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Password Rules • Must contain
– at least eight characters – at least one of each of:
• upper-‐case leRer • lower-‐case leRer • numeric digit • “special” character (! @ # $ % ^ & etc.)
• Good j#K01vz$euP@!udls
• Bad P@ssw0rd
• One method 1. computer security is very important for nersc users 2. csivifnu 3. C$1v1fnu
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Allocations Process - PIs
• PIs apply through Energy Research Compu3ng Alloca3ons Process (ERCAP) – Part of NIM – Typically late summer – Science objec:ves, approach, and resource requirements
• Computer :me and archival storage space
– Reviewed and awarded by DOE Science Offices – Most alloca:ons are awarded in late Fall
• Alloca:on year starts in January • Small startup alloca:ons are awarded throughout the year
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Allocations Process - NERSC
• Amount of MPP 9me available – Approximately 3 billion MPP hours AY14 – 80% to “DOE Base” – 10% to ASCR Leadership Compu:ng Challenge (ALCC) – 10% to “Director’s Reserve”
• NERSC Ini:a:ve for Scien:fic Explora:on (NISE) – Big Data – Highly Collabora:ve – Extreme Networking
• Educa:on, startups, staff, etc.
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Allocation Units
• MPP Hour – Per-‐core – Currently based on Hopper
• Machine charge factor (MCF) – Hopper: 1.0 – Carver: 1.5 – Edison: 2.0
– PI determines percentage of repo’s alloca:on for each user
• Storage Resource Unit (SRU) – Reflect rela:ve costs of “doing business” – Influence user behavior towards efficiency
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MPP Allocation Charging
• No charges for interac9ve work • Batch (parallel) charges
Job charge = WT * NN * NC * QCF * MCF WT: elapsed wall-‐clock :me in hours NN: number of nodes NC: number of cores per node QCF: queue charge factor
– low: 0.5 – premium: 2.0 – all others: 1.0
MCF: machine charge factor Edison: 25% discount if NN >= 683
• Batch (serial) charges NN = 1 NC = 1
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Storage Allocation Charging
• Based on three measures – Number of files (NF) – GB of space (S) – GB transferred (T)
• Daily charge = 0.0000393 * NF + 0.0131147 * S + 4.0 * T • Member of mul9ple repos – Storage charges split among repos
• Default: prorated by alloca:on size • User can change
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Running Out of Time
• User – PI determines a percentage of the repo’s MPP alloca:on for each user
– If user runs out of :me • Can’t run batch jobs • Contact PI to increase percentage
• Repo – If repo runs out of :me, contact PI to contact appropriate DOE Science Office Alloca:ons Manager • Each Office typically holds a certain amount of :me in reserve
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Publication Acknowledgement
• Please acknowledge NERSC in your publica9ons This research used resources of the Na:onal Energy Research Scien:fic Compu:ng Center, which is supported by the Office of Science of the U.S. Department of Energy under Contract No. DE-‐AC02-‐05CH11231.
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Resources • Self Help h@p://www.nersc.gov/users/accounts/ h@p://www.nersc.gov/users/accounts/user-‐accounts/ h@p://www.nersc.gov/users/accounts/alloca9ons/ h@ps://www.nersc.gov/users/data-‐and-‐file-‐systems/hpss/
hpss-‐charging/ h@p://www.nersc.gov/users/accounts/nim/ h@p://nim.nersc.gov • NERSC Account Support h@p://help.nersc.gov [email protected] 1-‐800-‐66-‐NERSC, menu op9on 2
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Thank you.
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